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9) Which of the following is **not** a basic requirement for…

9) Which of the following is **not** a basic requirement for life?

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44) Comets with extremely eccentric orbits, like comets Hyak…

44) Comets with extremely eccentric orbits, like comets Hyakutake and Hale-Bopp,

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49) Sunspots are colder than the surrounding solar surface b…

49) Sunspots are colder than the surrounding solar surface because

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30) A rocky leftover planetesimal orbiting the Sun is

30) A rocky leftover planetesimal orbiting the Sun is

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22) After Mars, the next most likely candidates for life in…

22) After Mars, the next most likely candidates for life in the Solar System are

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5) To detect an exoplanet by means of the Doppler shift, you…

5) To detect an exoplanet by means of the Doppler shift, you look for a periodic shift of the spectrum lines:

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34) Which of the following methods has led to the most disco…

34) Which of the following methods has led to the most discoveries of massive planets orbiting near their parent stars?

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27) What is the Sun made of?

27) What is the Sun made of?

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18) What is the largest dwarf planet discovered to date?

18) What is the largest dwarf planet discovered to date?

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39) Meteorites can come from

39) Meteorites can come from

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